"We can't move that rock!" Ben declared. "We shall have to drill it and blast it." But we had used all the powder and fuse, and it would take several hours to get more. Ben insisted, however, on sending Alfred Batchelder for the powder, and then, seizing the hammer and drill, he began to drill a hole in the side of the rock. Thomas, however, still believed that we could move the rock by throwing our united weight on a long pry; and many of the boys agreed with him. We felled a spruce tree seven inches in diameter, trimmed it and cut a pry twenty feet long from it. Carrying it to the rock, we set a stone for a fulcrum, and then threw our weight repeatedly on the long end. The rock, which must have weighed ten tons or more, scarcely stirred. Ben laughed at us scornfully and went on drilling. All the while Adriana stood weeping, and the other girls were shedding tears in sympathy. Rufus's distressed cries came to our ears, entreating us to help him and saying something that we could not understand about his leg. As Addison stood racking his brain for some quicker way of moving the rock he remembered a contrivance, called a "giant purchase," that he had heard of lumbermen's using to break jams of logs on the Androscoggin River. He had never seen one and had only the vaguest idea how it worked. All he knew was that it consisted of an immense lever, forty feet long, laid on a log support and hauled laterally to and fro by horses. He knew that you could thus get a titanic application of power, for if the long arm of the lever were forty feet long and the short arm four feet, the strength of three horses pulling on the long arm would be increased tenfold--that is, the power of thirty horses would be applied against the object to be moved. Addison explained his plan to the rest of us. He sent Thomas and me to lead several of our horses up through the woods to the pond. We ran all the way; and we took the whippletrees off the double wagons, and brought all the spare rope halters. Within an hour we were back there with four of the strongest horses. Meanwhile the others had been busy; even Ben had been persuaded to drop his drilling and to help the other boys cut the great lever--a straight spruce tree forty or forty-five feet tall. The girls, too, had worked; they had even helped us drag the two spruce logs for the lever to slide on. In fact, every one had worked with might and main in a kind of breathless anxiety, for Rufus's very life seemed to be hanging on the success of our exertions. A few feet to the left of the fallen rock was another boulder that served admirably for a fulcrum, and before long we had the big lever in place with the end of the short arm bearing against the fallen slab. When we had attached the horses to the farther end, Addison gave the word to start. As the horses gathered themselves for the pull we watched anxiously. The great log lever, which was more than a foot in diameter, bent visibly as they lunged forward.